Speed-changing device.



P. M. RAINEY.

SPEED CHANGING DEVICE.

APPLICATION FILED FEB. 8. 191a.

Patented Mar. 11,1919.

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PAUL M. namrrr, or enter: RIDGE, new Jansen, ASSIGNOB rownsrnnn anaemiccomrnn'r, mconronarnn, or new roan, It; 2., A conronn'rion or new YORK.

SPEED-CHANGING Dimes.

Specification of Letters Patent. t nt 11, 191

Application filed February 8, 1918; Serial No. 216,109.

To all whom it may concern:

Be it known that I, PAUL M. RAINBY, a

This invention relates to speed changing means and has for its objectthe provision of simple, compact, but highly efiicient devices forvarying the speed ratio between two moving mechanisms withoutinterrupting the continuity. of their operation.

To this end, the invention comprises two moving members, one driving andthe other driven, which are connected by gearing having flexible drivingsurfaces; and means for so moving said gearing that the effective gearratio between the moving members is readily altered, this alterationbeing dependcut on the fact that the driving surfaces are of flexiblematerial. The means for moving said gearing is actuated by controllingmechanism andis so arranged that the gear ratio may be increased ordecreased in a predetermined manner. This mechanism is shown as adaptedto be controlled by electric means and is particularly useful inprinting telegraph systems to maintain the speed of the receivingdistributer in synchronism with that of the sending distributer.

The invention is illustrated in the drawing, of which Figure 1 is anelevation of the device; Fig. 2 is an end view of the device as shown.in Fig. 1 looking in the direction of the arrow, with a certain portionof the mechanism cut away; and Fig. 3 is an elevation of a modifiedform.

This invention, as shown in'Figs. 1 and 2, consists of two shafts 1 and2, having on adjacent ends driving disks 3 and 4. These disks areconnected for transmission purposes by a disk 5 having its drivingsurface composed of flexible material. This disk is mounted in aU-shaped frame 6,

which is pivoted at its rear endon an up" rightmember 8, the U-shapedmember being extended upwardly to form an armature 7, which extendsbetween the pole pieces 13 of magnets '11 mounted on a forwardlyextended portion 9 of the upright member 8. This armature is maintainedin a position midway between the pole pieces 13 by a spring 12attachedatone end to said armature 7 and at theother end to the yokepiece 10 of the magnets 11.

To control the actuation "of the armature -7, and therethrough themovement of the disk 5, there is provided a control magnet18 energizedover a line wire 19 and adapted'to move its armature 16 between twocontacts 14 and 15, and connect a battery 17 to one or the other of thewindings of magnets 11. This controlling device is of the same generalcharacter as that set forth in my appllcation entitled Synchronizingsystem for multiplex telegraphy, filed March 26, 1914, Serial No. 827,315, in the drawing of which the magnet 22 corresponds to the magnet 181n the application. In accordance with the operation of this controlsystem, as set forth in my above-mentioned application, when the speedof the mechanism at the one end of the line reaches a value greater orless than that at the other end of the line, an impulse is sent whichmoves the armature 16 to energize one or the other of the mag-' nets 11.In the structure of this invention this energization of one of magnets11 shifts the angular position of the disk 5, and therefore changes theeffective radial distance of the points of contacts of the disk 5 withthe disks 3 and 4. The fact that the surface of the disk 5 is composedof flexible material will permit of a certain amount of angulardisplacement of disk 5 without reducing the effective driving contactbetween the disk 5 and disks 3 and 4.

In the modification shown in Fig. 3, two shafts, 20 and 23, are shownhaving disks 21' and 22 respectively at their adjacent ends and uponwhich bear disks 24 mounted on a shaft 25, the surfaces of these disksbeing composed of flexible material. The disks 24 are mounted in a frame26 pivoted in an upright member 27, which is connected to a frame 29, onwhich are also mounted magnets 28. The upper portions of frame 26 act asarmatures for the respective magnets 28. This mechanism is connected toa controlling device in a manner identical with that shown in Fig. 1,theefi'ect of the control on this device being similar to that shown anddescribed with respect to Fig. 1.

.hand disk 24 against disk 21, so that the effective working radii ofthe twodisks are altered, the flexibility of the driving surfaces-of thetwo disks permitting this alteration. I

In the particular application of this device-to a printin tele h system,the device will prefera bly fi focated at the receiving end of thesystem and one of the pair of shafts will be driven by a motor whosespeed is substantially constant. The other of the pair of shafts will beconnected to the receiving distributor in a manner which is well-known.Therefore, if at any time the speed of the receiving distributer drivintion wlth an intermedlate rotatmg member l5 falls outside the limitspredetermined for the proper operation thereof, the control mechanismcomes into play to actuate one or the other of the magnets to cause thealtera.

tion of the gear ratio between the two shafts and thereby rectify thedifierence in speed.

What is claimed is: 1.. A speed changing device comprising a and adriven surface, in combinapressure between the contact and surfaces..

2. A speed changing device comprising a driving and a driven member, incombination with an intermediate member for transmitting power betweensaid driving and driven members, said intermediate member I beingcomposed of resilient material, and

means for altering the mass distribution of said intermediate member tovary the transmission ratio between the two members.

3. A -speed changing device comprising a drivin and a driven disk, incombination with mtermediate disks for transmitting power between saiddrivin and driven disks, said intermediate dis s comprising resilientmaterial, and means for altering the mass distribution of saidintermediate disks to vary the transmission ratio between the twomembers.

4. A speed changing devicecomprising a driving and a driven shaft havingfriction disks on -their adjacent ends, means for transmitting powerbetween said disks comprising a pair of friction disks having resili entmaterial on their outer surfaces adapted to bear on the periphery ofsaid driving 60.

and driven disks, means connecting said resilient disks, and means formoving said disks in opposite directions with respect to said drivingand driven disks to alter the effective transmission ratio between thedriv- 65 ing and driven shafts.

5. A speed changing device'comprising a driving and a driven shafthaving friction disks on their adjacent ends, power transmittlng dlskshaving their outer-surfaces composed of resilient material bearing oneach of said friction disks, both of said power transmitting disks beingmounted in a yoke member, a pair of magnets disposed adjacent oppositeends of said yoke member, armatures forsaid magnets carried by 1 saidyoke member, and electrical means for energlzlng one or the other ofsaid magnets to simultaneously move said power transm-itting disks inopposite directions with respect to'said driving and driven disks toalter the transmission ratio between the two shafts. v

In witness whereof, I hereunto subscribe my name PAUL M. RAINEY.

this 1st day of February, A. D.

